<template>
    <!-- 波浪START -->
    <div>
        <svg class="waves" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
            viewBox="0 24 150 28" preserveAspectRatio="none" shape-rendering="auto">
            <defs>
                <path id="gentle-wave" d="M-160 44c30 0 58-18 88-18s 58 18 88 18 58-18 88-18 58 18 88 18 v44h-352z" />
            </defs>
            <g class="parallax">
                <use xlink:href="#gentle-wave" x="48" y="0" fill="rgba(255,255,255,0.7)" />
                <use xlink:href="#gentle-wave" x="48" y="3" fill="rgba(255,255,255,0.5)" />
                <use xlink:href="#gentle-wave" x="48" y="5" fill="rgba(255,255,255,0.3)" />
                <use xlink:href="#gentle-wave" x="48" y="7" fill="#fff" />
            </g>
        </svg>
    </div>
</template>
<style  scoped>
/* ------波浪Start------- */
.waves {
    position: relative;
    width: 100%;
    height: 80px;
    margin-bottom: -7px;
}

.content {
    position: relative;
    height: 20vh;
    text-align: center;
    background-color: white;
}

.parallax>use {
    /* 使use元素执行move-forever动画 */
    animation: move-forever 25s cubic-bezier(.55, .5, .45, .5) infinite;
}

.parallax>use:nth-child(1) {
    /* 延迟2秒启动动画  */
    animation-delay: -2s;
    /* 设置动画持续时间为7秒 */
    animation-duration: 7s;
}

.parallax>use:nth-child(2) {
    animation-delay: -3s;
    animation-duration: 10s;
}

.parallax>use:nth-child(3) {
    animation-delay: -4s;
    animation-duration: 13s;
}

.parallax>use:nth-child(4) {
    animation-delay: -5s;
    animation-duration: 20s;
}

@keyframes move-forever {
    0% {
        transform: translate3d(-90px, 0, 0);
    }

    100% {
        transform: translate3d(85px, 0, 0);
    }
}

@media (max-width: 768px) {
    .waves {
        height: 40px;
        min-height: 40px;
    }

    .content {
        height: 30vh;
    }

    h1 {
        font-size: 24px;
    }
}

/* ------波浪End------- */
</style>